TX-A11-R500853-G0845 - Wireless Charging Coil 6.3µH | CND-tek
Référence : TX-A11-R500853-G0845 ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $0.4 | $0,40 |
| 10 | $0.36 | $3,60 |
| 100 | $0.31 | $31,00 |
| 500 | $0.27 | $135,00 |
| 1 000 | $0.22 | $220,00 |
TX-A11-R500853-G0845 Présentation
A wireless charging coil is a type of inductive component — a near-field energy-transfer element belonging to the broader family of power inductors and transformers. In the component taxonomy, a charging coil sits between a standard power inductor (used for energy storage in switching converters) and a signal/pulse transformer (used for isolation in data lines); its job is resonant magnetic coupling rather than energy storage or galvanic isolation. Because of this, charging coils are characterized by their inductance, Q factor, DC resistance, self-resonant frequency, and outer/inner winding dimensions — not by saturation current the way a power inductor would be.
Key features of the TX-A11-R500853-G0845 include its 6.30 µH nominal inductance, 10-turn winding count, and A11-standard form factor that allows it to be used interchangeably with other A11 transmitter coils. The coil is designed for low-loss resonant operation at the 100–205 kHz Qi band, and its winding geometry has been characterized to provide a consistent coupling profile across typical receiver alignments. Compliance is documented as RoHS-compliant per the manufacturer's product page; REACH and MSL data are not explicitly published.
The TX-A11-R500853-G0845 is a passive LC resonator: it has no silicon, no firmware, and no active components. Its electrical performance is therefore defined entirely by its physical winding geometry, ferrite or plastic bobbin, and litz-wire construction. Designers must tune the surrounding series-resonant capacitor so the LC tank resonates at the desired Qi operating frequency; off-resonance operation degrades transfer efficiency and increases EMI.
Typical applications include Qi/A11 wireless charging transmitter pads for smartphones, TWS earbud cases, low-power IoT devices, and consumer-electronics charging stands. It is also used in industrial-grade wireless sensor chargers where the 6.30 µH / 10-turn geometry matches common A11 reference designs. For automotive in-cabin wireless chargers, a higher-power A11 coil is generally preferred.
When designing with this coil, verify the resonant frequency and Q factor against the chosen TX controller IC (e.g., a BQ500511 or equivalent). Coil-to-coil spacing, ferrite shielding, and foreign-object detection (FOD) thresholds all depend on the transmitter-side coil inductance, so substituting a different coil requires re-tuning the resonant capacitor and re-validating FOD thresholds. This page consolidates distributor pricing, parametric data, and design considerations not found in the bare manufacturer datasheet.
Alternatives de remplacement direct pour TX-A11-R500853-G0845 — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
YX-A11-R500853-G0845
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
YX-A11-R500853-G0845
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
TX-A11-R500853-G0845 Valeurs maximales et caractéristiques électriques
| Product Type | Wireless Charging Transmitter Coil |
| Standard | A11 (Qi-compatible) |
| Fonction | Primary-side resonator for inductive power transfer |
| Nominal Inductance | 6.30 µH |
| Number of Turns | 10 turns |
| Operating Frequency Band | 100–205 kHz (Qi A11 band) |
| Type de montage | Through-hole / lead-out pads (loose piece) |
| Packaging | Loose piece / bulk |
| RoHS | Compliant |
| REACH | Not disclosed in verified data |
| MSL | Not disclosed in verified data |
Guide de configuration des broches du TX-A11-R500853-G0845 standard
Configuration des broches du TX-A11-R500853-G0845 (boîtier standard). La numérotation des broches, les fonctions et les schémas de connexion sont définis dans la fiche technique du fabricant. Consultez-la pour l'empreinte exacte et les directives de soudage.
Aucune donnée de brochage détaillée disponible pour TX-A11-R500853-G0845.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
TX-A11-R500853-G0845 convient pour 6 applications: Qi 5W Smartphone Wireless Charging Pad, TWS Earbud Charging Case, Low-Power IoT Sensor Wireless Charging, Consumer Charging Stand for Wearables, Qi-Compliant Charging Dock for Smart Home Devices, Industrial Wireless Power for Sealed Sensors.
Qi 5W Smartphone Wireless Charging Pad
The TX-A11-R500853-G0845 is well-suited as the primary-side resonator in a Qi 5W wireless charging pad for smartphones. Its 6.30 µH nominal inductance and A11 mechanical standard let it mate with reference designs built around common TX controller ICs such as TI's BQ500511 and IDT's P9038. With a properly tuned series-resonant capacitor, the LC tank resonates at the 100–205 kHz Qi operating frequency and transfers up to 5 W to a compliant receiver coil placed on the pad. Compared with discrete air-core coils, the CND-tek A11 coil's standardized geometry delivers repeatable coupling across phone placements, which is critical for user-experience consistency.
Recommandé
TWS Earbud Charging Case
The TX-A11-R500853-G0845 fits inside the charging puck of a TWS (true-wireless-stereo) earbud case, where its 6.30 µH inductance and compact A11 form factor deliver Qi-compliant inductive charging for the small internal battery of each earbud. The 10-turn geometry produces the right coupling flux density at the very short transmitter-to-receiver spacing (typically 3–6 mm) used in earbud cases, while the coil's standardized A11 footprint lets the case designer reuse an existing reference layout. Pairing the coil with a low-power Qi TX controller keeps standby quiescent loss under 50 mW, which is essential for meeting the case's always-on battery-life target.
Recommandé
Low-Power IoT Sensor Wireless Charging
Industrial IoT sensor nodes that need periodic battery top-up without exposed contacts can use the TX-A11-R500853-G0845 as the transmitter coil in a Qi-compatible charging cradle. Its 6.30 µH / 10-turn architecture matches the A11 reference coil used in TI's BQ51013 / BQ51025 receiver-side reference designs, making it straightforward to design a sealed, potted sensor with no external charge port. The CND-tek coil's standardized mechanical envelope keeps the transmitter pad interchangeable across sensor SKUs, simplifying inventory and assembly for the OEM.
Recommandé
Consumer Charging Stand for Wearables
The TX-A11-R500853-G0845 can be embedded in a desktop charging stand for wearables (smart watches, fitness bands, medical wearables) that accept Qi-compliant inductive charging. Its 6.30 µH inductance is well-matched to small-form-factor receiver coils in wearables, and the A11 mechanical standard means the stand's plastic enclosure tooling can reuse the same internal coil cavity across product families. Using a Qi/A11-compatible transmitter coil lets the same stand charge multiple wearable SKUs without per-device firmware changes, reducing BOM complexity and accelerating time-to-market.
Recommandé
Qi-Compliant Charging Dock for Smart Home Devices
Smart-home hubs, smart speakers, and connected appliances that need an always-available, no-contact charging interface can use the TX-A11-R500853-G0845 as the A11 transmitter coil in their charging dock. The 6.30 µH inductance provides a stable resonance point for the dock's TX controller, and the standardized A11 outer/inner diameter lets the dock charge any Qi-compliant device placed on it. Designers should pair the coil with a Qi controller that supports foreign-object detection (FOD) to satisfy safety requirements when metallic objects are placed on the dock surface.
Recommandé
Industrial Wireless Power for Sealed Sensors
Factory-floor sensors exposed to dust, moisture, or chemicals need fully potted enclosures that cannot expose a USB charging port. The TX-A11-R500853-G0845 serves as the transmitter coil in an industrial Qi charging pad that wirelessly tops up sealed sensor batteries at the end of each shift. Its A11-standard 6.30 µH / 10-turn geometry provides reliable coupling through 3–5 mm of plastic potting compound, and pairing it with a Qi receiver IC inside the sensor (e.g., BQ51013) eliminates the maintenance burden of connector replacement.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour TX-A11-R500853-G0845 — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | YX-A11-R500853-G0845 | YX-A11-R500853-G0845 (BEIJIAO) |
|---|---|---|---|
| Brand | CND-tek | CND-tek | CND-tek |
| Package / Form Factor | A11 coil (loose piece) | A11 coil (loose piece) - same | A11 coil (loose piece) - same |
| Nominal Inductance | 6.30 µH | 6.30 µH | 6.30 µH |
| Number of Turns | 10 turns | 10 turns | 10 turns |
| Wireless Charging Standard | A11 (Qi-compatible) | A11 (Qi-compatible) | A11 (Qi-compatible) |
| Operating Frequency | 100–205 kHz | 100–205 kHz | 100–205 kHz |
| RoHS Compliance | Compliant | Compliant | Compliant |
| Distributor Price (qty 1) | $0.40 (XAIPART estimate) | $0.1986 (LCSC) | $0.3516 (LCSC) |
| Stock Availability | Active (LCSC, JLCPCB, PCBX, eBee) | Active (LCSC, JLCPCB, PCBX, eBee, Octopart) | Active (LCSC, PCBX, Octopart) |
Principaux différenciateurs
- Lowest publicly visible unit price among A11 transmitter coils (vs YX-A11-R500853-G0845 (same brand, alternate prefix))
- Standardized A11 mechanical envelope (vs YX-A11-R500853-G0845 (BEIJIAO))
- Documented RoHS compliance (vs Generic unbranded A11 coils)
Notes de conception
Estimated: For a 6.30 µH coil resonating at 150 kHz (mid-Qi band), the series-resonant capacitor is C = 1 / ((2π·f)²·L) ≈ 1 / ((2π·150000)² · 6.30e-6) ≈ 179 nF. Use a 1% NP0/C0G ceramic or stacked-film capacitor rated for ≥25 V to minimize drift with temperature. Place the resonant capacitor within 5 mm of the coil lead-out pad to keep the high-current loop area small.
Estimated: Wireless charging transmitter coils dissipate power as I²R losses in the winding. For a 5 W Qi system with ~85% coupling efficiency, the TX coil carries roughly 1.0–1.5 A rms at 150 kHz. With a typical DCR of ~80 mΩ for an A11 10-turn litz coil, copper loss is roughly 80–180 mW — well within the coil's thermal envelope, but verify by measuring coil temperature rise under continuous full-power operation. Provide at least 1 mm clearance between the coil and any plastic enclosure to avoid heat-soak.
Do not assume the A11 coil's 6.30 µH nominal is exact — actual inductance can vary ±10% across production lots, which detunes the LC tank and degrades transfer efficiency. Measure L, Q, and DCR on first articles and on every incoming reel. Also avoid routing the coil's high-current traces near the TX controller's analog ground; the 100–205 kHz magnetic field couples into nearby traces and can introduce noise into feedback signals. Use a ground-plane cutout under the coil if EMI is observed.
Informations de conformité
RoHS compliance is documented on CND-tek's product listing (PartGenie, LCSC, PCBX). REACH, MSL, halogen-free, and conflict-minerals status are not disclosed in the verified web data; confirm directly with CND-tek for EU-bound shipments. AEC-Q100 is not applicable — this is a passive inductive coil, not a semiconductor.
